Note by the Secretariat The annexes to the present note contain tables listing comments and responses relating to the draft risk profile on hexachlorobutadiene as set out in document UNEP/POPS/POPRC.8/3. Annex I pertains to the third draft of the risk profile and annex II relates to the second draft. The annexes are reproduced as submitted by the intersessional working group and have not been formally edited by the Secretariat.